Results 1 to 10 of about 22,763 (260)
Tunable Multiband Microwave Photonic Filters
Photonics, 2017 The increasing demand for multifunctional devices, the use of cognitive wireless technology to solve the frequency resource shortage problem, as well as the capabilities and operational flexibility necessary to meet ever-changing environment result in an
Mable P Fok, Jia Ge
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Quadrature Compressive Sampling for Multiband Radar Echo Signals
IEEE Access, 2017 In multiband/multifunction radars, the received echoes are usually multiband signals consisting of several subbands with different carrier frequencies. Digital acquisition of the in-phase and quadrature (I and Q) components of each subband is important ...
Shengyao Chen, Feng Xi
exaly +3 more sources
A Low-Profile, Triple-Band, and Wideband Antenna Using Dual-Band AMC
Sensors, 2023 When a wideband antenna is backed by an artificial magnetic conductor (AMC) reflector, the bandwidth is reduced. With the optimization of the shape of the AMC it is possible to exhibit multiband behavior, but the problem becomes complex if the bands are ...
Rafael Gonçalves Licursi de Mello +2 more
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Multiband Polarization Imaging [PDF]
Journal of Sensors, 2016 Multiband polarization imaging is an emerging sensing method that enables simultaneous acquisition of multiband spectral and multiangle polarization information of an object of interest in the scene. Spectral signatures of the light reflected from a target reveal the characteristics of the material composing the target while polarized light provides ...
Yongqiang Zhao 0001 +3 more
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A Survey on Microstrip Single/Multiband Bandpass Filter for 5G Applications [PDF]
Engineering and Technology Journal, 2023 For a long time, extensive research on microstrip bandpass filters has been documented to meet the standards of modern multiservice wireless communication systems.
Halah I. Khani, Ahmed S. Ezzulddin
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Multiband excitation vocoder [PDF]
IEEE Transactions on Acoustics, Speech, and Signal Processing, 1988 A speech model, referred to as the multiband excitation model, is presented. In this model the band around each harmonic of the fundamental frequency is declared voiced or unvoiced. Estimation methods for the parameters of the model are developed and methods to synthesize speech from the model parameters are described.
Daniel W. Griffin, Jae S. Lim
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Analysis of Graphene Pythagoras Tree Fractal Antenna with Thin SiO2 Substrate in Terahertz Regime
Annals of West University of Timisoara: Physics, 2023 The Pythagoras Tree Fractal patch is considered on a SiO2 substrate thickness of 1.5 µm to radiate at four frequencies of 4.975THz, 5.38THz, 6.73THz, and 7.61THz with Voltage Standing Wave Ratio (VSWR) ≤ 2.
Hafdi Zakarya +3 more
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IEEE Access, 2023 This paper proposes a fully-integrated dual-band CMOS RF energy harvesting (RFEH) front-end with an adaptive frequency selector that can select between two harvesting frequencies of 1.9 GHz and 2.4 GHz. The RFEH front end includes two pairs of on-chip LC
Wen Xun Lian +8 more
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Sensors, 2020 A multiband coplanar waveguide (CPW)-fed antenna loaded with metamaterial unit cell for GSM900, WLAN, LTE-A, and 5G Wi-Fi applications is presented in this paper.
Samir Salem Al-Bawri +7 more
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Improving the Breath-Holding CVR Measurement Using the Multiband Multi-Echo EPI Sequence
Frontiers in Physiology, 2021 Blood oxygen level-dependent (BOLD) functional MRI (fMRI) is commonly used to measure cerebrovascular reactivity (CVR), which can convey insightful information about neurovascular health.
Alexander D. Cohen +6 more
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